Latitude and Longitude

An evolving tutorial.

Call the Libraries

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library(plotly)

Generate Some Random Coordinates

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N <- 10 # number of points

# latitude from -90 to +90

latitude <- runif(N, min = -90, max = 90) 

# longitude from + -180 to + 180

longitude <- runif(N, min = -180, max = 180) 

# 1st point reset to 0, 0

latitude[1] <- 0

longitude[1] <- 0

# label

label <- LETTERS[1:N] # label with letters of alphabet

# dataframe

mydata <- data.frame(latitude, longitude, label)

mydata # replay

    latitude  longitude label
1    0.00000    0.00000     A
2   84.26699  129.62778     B
3  -16.59724  -56.32133     C
4   27.35854  -92.25697     D
5  -55.60979   35.65833     E
6   74.41507   15.76868     F
7  -23.64852 -143.13018     G
8   72.11952  -55.33315     H
9  -33.78938  103.53958     I
10 -38.88660  -13.57762     J

Map The Coordinates

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mymap <- plot_geo(mydata) %>%
  add_markers(x = ~longitude,
              y = ~latitude,
              color = ~label,
              colors = "Spectral") %>%
  layout(title = "Randomly Generated Coordinates")

mymap # replay